Hoisting apparatus



Sept. 14, 1926. 1,599,938 C ZETTERLUND H01 STING APPARATUS Filed Nov. 16 1925 4 Sheets-Shoot 1 Spt. 14;1926.

C. ZETTERLUND aoIsTINq APPARATUS 4 Sheets-Sheet 2 Filed Nov. 16, 1925 Sept. 14 1926.

C. ZETTERLUND HOISTING APPARATUS {Sheets-Sheet 3 Filed Nov. 16, 1925 Sept; 14 1926.

' C. ZETTERLUND HOISTING APPARATUS I 4 Sheets-Sheet 4 Filed Nov. 16, 1925 "Patented Sept. 14, 1926.

were!) STa'rs-s CARL ZETIERLUND, OF CHICAGO, ILLINOIS.

HOISTING AFTPABAT'US.

Application filed November 16, 1925. Seriallto. -9,291.

The invention relates to hoisting apparatus and particularly to that type having associated therewith and having a plurality oi conveyances or elevators having means for automatically preventing the travel of said conveyances when the latter reach a certain predetermined position in their travel.

The invention has as its prime object the provision of means whereby the hoisting drum is driven in opposite directions by a means which rotates in one direction, to cause both the hoisting and lowering of the conveyances.

It is a further object of the invention to provide a means whereby the drum is retarded in its rotation when the means which caused its connection with the driving element is arrangedin a neutral position, to 0 thereby prevent the accidental lowering of the conveyance after it has reached a predetermined elevation or intermediate position.

It is also an object to associate with the winding drum an element for causing the retation of the drum and to also associate a means for actuating said element with said drum.

In additionto the above it is a further object to employ and locate a means in the path of travel of the conveyances which is operable by engagement with the convey ances for causing the means for connecting the drum and driving mechanism to be acthereby allow the operation of'tlle driving means without imparting its'motion to the drum.

It is a further object to associate with the means just described a means operable to automatically prevent the lowering of the conveyances when said conveyances have reached a given position, which means is operable upon actuation to release said holding means to automatically cause the element of the winding drum to be actuated and cause one conveyance to be lowered and tuated and arranged in a neutral position to from the spirit of the appended claims iiorming a part thereof.

In the drawings, Fig. 1 is a top plan view of a hoisting device constructed according to one embodiment of which the invention is susceptible.

Fig. 2 is a side elevation of the device shown in Fig, 1 showing a conveyance and a support therefor.

Fig. 3 is a section talren on line 33 of Fig. 2.

Fig. 1 is a fragmentary View of one of the elements employed in the device shown in Figs. 1 to 3 for holding the hoisting drum againstrotation.

Fig. 5 is a view taken on line 55 of Fig. 4. i

Fig. 6 is a front view of the upper position of the standard and the mechanism associated therewith. I

F 7 and 8 are modified structures which may be employed in lieu of certain elements shown in Fig. 6. a

Fig. 9 is a central section through a winding drum having applied thereto a means for gradually applying the action of the drum to the cables wound upon the drum.

Fig. 10 is a section taken on line 10-10 of Fig. 8. V

The embodiment of the invention illustrated in the drawings contemplates the use of a winding drum 10 around and from which a cable 11 is wound and unwound to cause the conveyances 12 and 13 to be respectively raised andlowered along the parallel uprights 1a and 15. The ends of the cable arepassed around the sheaves 16 and 17 adjacent the drum and thence upwardly over the pulleys 18 and 19 located at the upper end of the uprights. The cable has its opposite ends respectively secured to the conveyances 12 and 13, from which it can be seen that the direction in which the drum is rotated controls the conveyances secured to said cables. The winding drum 1O located between the elements 20 and 21 having gear teeth which are in'mesh with the beveled gear 22 mounted upon the shaft 23 which is jonrnaled in the support 24 carrying rollers 25, 26, arranged to respectively engage the side faces of the elements 20 and 21. The elements 20 and 21 are i-urther held with relation to the drum 10 by means of the rollers 24 These elements 20 and 21 and the drum are supported by the hollow shaft 25 mounted in bearings 26 and 27, the drum being mounted for rotation with the shaft and the elements 20 and 21 are rotatable relatively thereto or therewith depending upon the position of the clutch element 29. During the rotation of the shaft 23 the elements 20 and 21 are by virtue of the beveled gear 22 rotated in opposite directions with respect to the drum 10 when the clutch element 29 is arranged in the position thereof shown in Fig. 3 from which it is evident that should the clutch element be caused to engage with either the elements 20, 21 that the drum will be rotated in the direction of rotation of the particular elenent with which the clutch element engages causing the opposite ends of the cable 11 to be let off and taken up resulting in elevating one and lowering the other of the conveyances.

The clutch element 29 is actuated to engage either one or the other of said elements 20 or 21 or be arranged in a neutral position through means of the segmental pivoted gear 30 which meshes with rack teeth provided upon the clutch element 29. This toothed pivoted gear 30 is carried by the drum 10 and has the lever 31 thereof extended through the shaft 25. Cables 32 and 33 are connected to the lever 31 by means of the swivel connections 34 and 35 and said cables extend from the respective swivels over sheaves 36 and 37 to sheaves 38, 39, 40 and 41. The cables and 33 extend from the sheaves 40 and 41 across each other as indicated at 42 and have their opposite ends connected to the cross arm 43 which cross arm is connected to the pivoted element 44 having the upstanding part 45 and the member 46 which is in the path of'travel of both conveyances 12 and 13.

A holding element generally designated 47 is located between the sheaves 18 and 19 which is designed to be operated so as to alternately engage the teeth provided upon the sheaves 13 and 19 and to hold one of the sheaves against rotation in one direction and permits the other sheave to rotate in the opposite direction, in other words, the holding element permits one conveyance to be lowered and the other elevated yet will not allow the conveyance being elevated to accidentally lower when the device is set for the reverse operation of the conveyances.

The operation of this holding element generally designated 47, is caused by engagement of one of the conveyances with one end or the other of the element 46 which causes rotation of the member 44 and causes the holding dogs 48 and 49 to be alternately moved upon their pivot '59 into and out of engagement with the teeth of the respective pulleys 18 and 19. To effect this actuation of the holding dogs a member 51 is connected to one of the dogs and connected with the member 45, the dogs being constructed so that the movement of one will be transmitted to the other upon movement of the member 45 upon the pivot 44. The operation of the member 45 also causes the actuation of the member 43 which movement is transmitted by means of the cables 32 and 33 to the pivoted element 30 carried by the drum 10 which will cause the clutch element 29 to engage either one or the other of the elements 20 and 21 or move said element 29 to assume a central or neutral position depending upon the position to which the member 46 is moved.

The drum 10 carries oppositely extending spring pressed holding elements 53 and respectively located upon opposite sides of the drum and are provided to respectively co-operate with the elements 20 and 21 and retard rotation of the drum when the clutch element 29 is arranged in a neutral position. These holding elements are designed to enter the openings 55, 55 into which the clutch element 29 is also adapted to be arranged. These elements 53 and 54 permit the elements 20 and 21 to be driven in opposite directions but prevent the drum from rotating any appreciable extent relatively to the elements 20 and 21 when a load is applied to the drum with the clutch element 29 in a neutral position.

The cross arm 43 may be constructed as shown in Fig. 7. This arrangement shown in Fig. 7 contemplates the use of the arcuate segment 56, which is part of the cross arm 58. The arcnate segment 56 has an edge thereof provided with a plurality of relatively flat angularly disposed faces 57. A roller 59 and tension spring 50 is associated with the arcuate portion 56 the roller being arranged to ride upon the faces 57 and seat itself in the angle formed between the faces 57 which will maintain the cross arm in either a central neutral position or in the position thereof shown in Fig. 7 and also in a position in which the arm is arranged in a reverse position from that illustrated. In view of the fact that this arm 58 is connected to the arm 31 of the segment 30 in a manner similar to that explained in conjunction with the cross arm 43 it is manifest that the clutch element 29 will be actuated and held in one of its several positions as previously explained in connection with the arm 43.

The structure illustrated in Fig. 8 discloses an arrangement which may be employed in lieu of the cross arm 46.

This last mentioned structure contemplates utilizing a pulley 61 which is secured to the shaft of the element 45 and has a cable section'62 arranged upon the pulley, the opposite ends of the cable section being respectively connected to slidably mounted blocks 63 and 64 to which the opposite ends of the cables 32 and 33 are connected, the blocks being extended into the path of the conveyances 12 and 13 for engagement thereby during their upward travel which when engaged will cause the partial rotation of the pulley 61, actuate the clutch element 29 and also operate the holding mechanism generally designated 47.

The arrangement illustrated in Figs. 9 and 10 is applicable for association with the structure illustrated in Fig. 1 and is employed for gradually applying the power of the winding drum to the cables upon rotation of the drum. This means includes an annular member curved in cross section and loosely arranged in anannular re cess 71 provided in the face of the drum 10, so that it may rotate with respect to the drum. The cable is wound around this annular member and frictionally engages it to cause the annular member to rotate with respect to the drum upon the initial rotation of the drum. The annular member 7 0 is provided with an inwardly projecting lug 73 which operates in the recess 74 in which recess a lug 75 is located. A coiled spring 76 is secured to the lugs 73 and 75, the spring being operable in the recess 74 and employed to resist the rotation of the annular member and to restore the annular member 7 0 upon the release of the pull applied by the drum to the cable.

The rotation of the annular member relatively to the drum is limited by means of the engagement of the lug 73 with the terminations such as 77 and 78 of the recess 741, it being evident that after the lug engages the drum that the annular member will thereafter be rotated with the drum.

From the foregoing description, it is manifest that an arrangement is provided in which the hoisting drum is operable in either direction by means of a connection wit-h the driving elements which are rotated in opposite directions by means of a driver which is rotatable in one direction only. It is further evident that the arrangement is such that. in said connection a clutch is capable of being arranged to cause the drum to be driven in either direction or be arranged in a neutral position, the drum also being held against rotation when said connection or clutch is arranged in said neutral iosition, the mechanism being such that the clutch element is operable or controlled by a conveyance when the latter reaches a predetermined position in its travel.

Having thus fully described my-invention what I claim as new and desire to secure by Letters Patent is 1. In a hoisting device, the combination of a hoisting drum, means located upon opposite sides of the drum for driving said drum, means rotatable in one direction di rectly engaging said first mentioned means for causing the rotation of said first men tioned means in opposite directions, and means carried by the drum movable relatively to the drum for engagement with either of said first mentioned means.

2. In a hoisting device, the combination of a hoisting drum, means located uponop posite sides of the drum for driving said drum, means rotatable in one direction directly engaging said first mentioned means for causing the rotation of said first mentioned means in opposite directions, and means carried by the drum movable relatively to the drum for engagement with either of said first mentioned means, said means which is carried bythe drum for engagement. with said first mentioned means being operable by a conveyance operable by the actuation of said drum.

8. In a hoisting device, the combination of a hoisting drum, means located upon opposite sides of the drum for driving said drum, means actuated in one direction directly engaging said first mentioned means for causing the rotation of said first men tioned means in opposite directions, and means carried by the drum movable relatively to the drum for engagement with either of said first mentioned means, said last mentioned means being movable to a position out of engagement with either of said first mentioned means.

4. In a hoisting device the combination of a hoisting drum, means located upon opposite sides of the drum for driving said drum, means for causing the rotation of said first mentioned means in opposite directions, and means carried by the drum for engagement with either of said first mentioned means, said last mentioned means being movable to a position out of engagement with either of said first mentioned means, and means for retarding the movementof the drum relative to said first mentioned means when said means carried by the drum is disengaged from said first mentioned means.

5. In a hoisting device the combination of a hoisting drum, driving elements for said drum located upon opposite sides of the drum and rotatable in opposite directions with respect to each other, means carried by the drum for connecting the drum with either of said driving elements, and means arranged axially of said drum in engagement with said means for connecting the drum with the driving elements for actuating said connecting means.

6. In a hoisting device the combination of a hoisting drum, driving elements for said drum located upon opposite sides of the drum and rotatable in opposite directions with respect to each other, means carried by the drum for connecting the drum with either of said driving elements, and means arranged axially of said drum in engagement with said means for connecting the drum with the driving elements for actuating said connecting means, said axially arranged means being operable by a con- 'veyance when said conveyance reaches a predetermined position.

7. In a hoisting device the combination of a hoisting drum, means located upon opposite sides oi the drum for driving said drum, means for causing the rotation of said first mentioned means, said last mentioned means being movable to a position out of en agement with either of said first mentioned means, said last mentioned means being operable by a conveyance and means operable by said conveyance for preventing the lowering 01" said conveyance when said conveyance reaches a predetermined posi-' tion.

8. in a hoisting device the combination of a hoisting drum, oppositely rotatable means located upon opposite sides of the drum, means for causing the connection of said drum with either of said oppositely rotatable means, said means for causing said connection being movable to a neutral position and oppositely extending elements arranged between the drum and said rotatable means for retarding the rotation for said drum when said connecting means is arranged in said neutral position.

9. In a hoisting device the combination of a hoisting drum, gears located upon opposite sides of the drum, a gear engaging both of said first mentioned gears, said first mentioned gears being rotatable in opposite directions by said gear, a clutch element for engaging either of said gears, said clutch element being carried by said drum, means for actuating said clutch element, said means being carried by said drum, means extending axially of said drum in opposite directions and being connected to said means for actuating said clutch element, said axially extending means being operable by a conveyance movable by said drum.

10. In a hoisting device the combination of a hoisting drum, gears located upon opposite sides of the drum, a gear engaging both of said first mentioned gears, said first mentioned gears being rotatable in opposite directions by said gear, a clutch element for engaging either of said gears, said clutch element being carried by said drum, means for actuating said clutch element, said means being carried by said drum, means extending axially of said drum in opposite directions and being connected to said means for actuating said clutch element, said a:;ial.y extending means being operable by a conveyance movable by said drum, and means 01 erable by said conveyance for preventing the lowering of said conveyance when said conveyance reaches a predetermined posi tion.

CARL ZETTERLUND. 

